1. Remove the peel and white pith from grapefruits. Cut the grapefruit into pieces and put in a bowl. Then squeeze any remaining fruit to get some juice. Keep the fruit and juice separate.

2. Preheat your oven to 350 degrees and line a broiler pan or baking sheet with foil.

3. Toss chicken, dry mustard, garlic powder, cinnamon, coriander, ginger, pepper and salt in a large bowl until the chicken is well coated. Place on pan in a single layer. Broil the chicken until cooked through, for at least 5 minutes.

4. While the chicken is cooking, mix peanut butter, soy sauce, sugar and hot sauce into the grapefruit juice until smooth. Add the cooked chicken and lettuce; toss to combine. Let sit for 5 minutes to make sure everything is coated then serve.